A corpo



s. M. JENKINS.

FORCE FEED LUBRICATOR.

APPUCATION FILED APR. 11. 1916.

l 1 9 5 ,02 5 Patented Aug. 15, 1916.

3 SHEETS-SHEET I.

v WITNESSES:

S. M. JENKINS.

FORCE FEED LUBRICATOR. APPLICATION FILED APR. H. 1916.

1 1 95,025 Patented Aug. 15, 1916.

3 SHEETS-SHEET 2.

WITNESSES; 5 i I \\X\{ K L I :7 [NI/E 0/? MW, 4 HUGH/W516 S. M. JENKINS.

FORCE FEED LUBRICATOR.

APPLICATION FILED APR- 1916- 1 1 95,025. Patented Aug. 15, 1916.

3 SHEETS-SHEET 3.

Pay 6.

J WITNESSES: I W by aagll/E/V gwfl "UNITED STATES PATENT @FFTGEZ SAMUEL M. JENKINS, OF LOUISVILLE, KENTUCKY, ASSIGNOR TO THE JENKINS GRAPHITE LUBRICATING COMPANY, OF LOUISVILLE, KENTUCKY, A CORPO- RATION OF KENTUCKY.

FORCE-FEED LUBRICATOR.

Specification of Letters Patent.

Patented Aug. 15, 1916.

Application filed April 11, 1916. Serial No. 90,442.

To all whom it may concern:

Be it known that I, SAMUEL M. JENKINS, acitizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented certain new and useful Improvements in Force-Feed Lubricators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to improvements in apparatus for forcibly feeding lubricants to valves, cylinders, thrust and tail bearings, or other places where it is necessary to supply lubricants under a forced feed.

My invention relates to certain improvements upon the inventions disclosed in my Patent No. 1073606, granted September 23, 1913 and entitled Method of lubrication, and in my Patent No. 1163410, granted December 7, 1915, and entitled Lubricating apparatus.

My invention is intended more especially to provide lubricating apparatus operated by hydraulic pressure under the action of steam or air pressure, as will be hereinafter more fully described.

Reference is had to the accompanying drawings in which similar parts are indicated by similar reference symbols throughout the several views.

Figure 1 shows a side elevation of the complete apparatus, showing the casting and attached parts; Fig. 2 shows a section along the line 2-2 of Fig. 1, looking in the direction of the arrows; Fig. 8 is a fragmentary view showing the valve handle and valve casing for supplying and carrying off the water used in the apparatus, the view being seen from the left of Fig. 1 Fig. 4 shows a view of the same parts as seen from the opposite side of Fig. 1; Fig. 5 shows a section along the lines 55 of each of Figs. 3 and l, and looking in the direction of the arrows; and Fig. 6 is a sectional view showing the means for controlling the sounding of the whistle.

1 provide a casting composed of the water cylinder A, closed at the top and bottom as shown, and the grease cylinder B which is open at the top and closed at the bottom, and these two cylinders are connected by a housmg C, open at both sides, as at C", for convenlence in assembling the stufiing boxes mounted in the heads A and B of the cylinders A and B, respectively. The bottom of-the cylinder A is closed in any suitable way, as by the screw head D, and the top of the grease cylinder B is preferably provided with a spout or bib B for convenience of pouring the grease into, the same.

A piston E projects through the heads A and B of the grease cylinders A and B, respectively, and is provided near its opposite ends with the pistons F andv G. The piston F is mounted in the cylinder A, and is provided with an annular disk f, on both sides of which are provided the leather cups 7 which are held in place by the followers 7"". This disk 7 is preferably provided with an annular groove f connected by the inlet passage f to the axial passage 6 in the piston E, so that if any liquid leaks by either of the leather cups it will find its way into the annular groove f and through the passages f and 6 out through the top of the piston rod E, and will thus show that the parts are not tight in the cylinder A. The piston G, mounted in the cylinder B, is provided with the annular disk g, having the leather cup g, with the follower g and forms a tight joint for the grease as the piston F is forced down under hydraulic pressure, as will be hereinafter described. The apparatus should be so constructed that the piston E may be forced up high enough to permit the insertion of grease through the bib B beneath the piston G.

There is a boss H cast on the side of the main casting, in which the admission and exhaust valve T and the needle valve M are mounted, as will be hereinafter described. This boss is also provided with inlets 2' for the admission of water under steam or pneumatic pressure, andwith a passage 2" opening into the top of the cylinder, which passages receive water under pressure from the pipe I connected to the boiler. The steam will condense in this pipe and will provide the necessary amount of water under pressure for the operation of the device.

Near the bottom of the cylinder A, I provide an outlet is for the water beneath the piston F, and this outlet is connected by the pipe K with the passage is in the boss H. A similar passage is provided opposite the valve seat, as shown in Fig. 2, and this passage is connected with the exhaust chamber 7:, see Fig. 2. In this chamber the spring m of the needle valve M is mounted, which needle valve normally closes the opening min the boss H. The stem of this needle valve is screw-threaded, as at 2119, and is provided with an adjusting nut m which nut engages .the arm n of the bell crank lever N, whlch is pivoted, as at O, to the main casting and has a downwardly-projecting arm n engaging in the strap P, which is connected by the connecting rod Q (see Fig. 1) to any reciprocating part of the engine (not shown). This strap P may be moved up or down on the arm n, and clamped at the desired position by means of the bolts 2) and 79 should it be desired to vary the throw of the arm 12.; but it will ordinarily be sufficient to give the requisite adjustment to the needle valve by adjusting the nut m The exhaust passage 70 may be open to the atmosphere, if desired, but I provide an outlet pipe R connected to the waste pipe S, between which is preferably provided a sight feed S of any suitable construction, so that it might be possible to ascertain by sight whether the apparatus is functioning properly.

In connection with the control of the piston F, I provide a three-way valve T, as shown in Figs. 2 and 5, which is provided with the curved passage t, and with the opposite passage t (see Fig. 2), which latter passage is expanded, as at 6 so as to connect, when the valve is thrown to the desired position, both the passages z" and W. This valve may be controlled either by hand, or automatically, as will now be described.

To control by hand I provide a handle T, whose travel is limited by the stops t on the boss H, as shown in Fig. 5, and the valve is normally locked in the desired position by means of the dog U, having the lug u adapted to engage in one or the other of the notches t or 6, as shown in Fig. 4:. hen this dog is in engagement with the corre sponding notch, the valve cannot be moved, but when the dog is lifted the valve is normally restored to the position for reversing the pressure on the piston F, as will be hereinafter described. This dog may be lifted either by hand or automatically by means of the chain V, which runs over the pulley V, and is connected to the head of the piston rod E. It will be obvious that when the piston G is forced downward, the slack of this chain will be taken up until finally the dog is lifted to the position shown in dotted lines in Fig. 4, at which time the spring T will shift the valve to the reverse position so that the pressure will now be shifted from above the piston F beneath the same, thus lifting the pistons F and G to the proper position for refilling from above with grease and water, respectively.

In order to make anaudible signal when the oil chamber is empty and the piston G has returned to the position for refilling the grease cylinder B, I provide a whistle attachment, such as the whistle \V, connected to the passage 10 formed in the boss Y, near the head of the cylinder B, which passage is connected to the chamber w containing the check valve m and the valve spring a), which passage is connected by the passage 102 to the pipe lV leading to any suitable source of air or steam pressure. The valve stem X is provided with a head X which projects in the path of the upward movement of the piston G, so that when the piston is raised high enough the valve will be lifted and the whistle will sound. If desired, this pipe V may be connected to the pipe I, above the water of condensation held in said pipe and operated by steam from the boilers; but any suitable source of supply of steam or compressed air may be used if desired.

The operation of the device is as follows: lVhen the apparatus is used for the first time, it will be necessary to lift the pistons to the raised position and to fill the cylinder A, above the piston F, with liquid. This liquid is preferably condensed steam, which may be supplied through the supply pipe I and the pipe K, which is accomplished by reversing the three-way valve T from the position shown in Fig. 2. This will cause the inflowing water to lift the pistons, if they should be down, until finally the bottom of the cylinder A is filled with water and the top of the cylinder B is open. Now grease is supplied to the cylinder 13 and the valve T is reversed to the position shown in Fig. 2. Now the water of condensation will flow in through the passage 2', above the piston F, and will tend to force this piston down against the action of the grease in the cylinder B, and also against the action of the water in the cylinder A, whose escape is intermittently controlled by the needle valve M, and will escape through the passage m and past the sight feed S. By adjusting this needle valve to the desired position a small amount of water may be permitted to escape intermittently from the bottom of the cylinder A, and a comparatively small amount of grease will be forced out through the outlets 7) at the base of the grease cylinder B which are connected to the parts needed to be lubricated. I have shown in Fig. 1 two of such outlets Z2, but one or more may be used if desired.

If it be desired to obtain a faster flow of grease, the needle valve may be so adjusted as to permit a faster escape of Water. It will be evident that Water being incompressible, the piston F cannot descend any faster than the water flows out of the bottom of the cylinder A unless there should be a leak. If there should be any leak past either of the cup leathers f of the piston F, this ater so escaping will flow through the passages f 7 and 0, out of the top of the piston rod E, and it will be evident that the parts are not functioning properly.

It will be noted that the needle valve is opened intermittently by the connecting rod Q connected to any reciprocating part of the engine, and consequently the higher the speed of the engine the more frequent will be the openings of the needle valve, and con sequently the more frequent the injections of lubricant to the parts to be lubricated, thus automatically regulating the frequency of lubrication by the speed of the engine.

lVhere the lubricant is carried directly into the steam pipe above the throttle of the en: gine, it Will be seen that the lubricant is applied directly proportional to the piston speed of the engine and consequently directly proportional to the volume of steam employed in the engine. Thus, it will be seen that for every reciprocation of the engine there will be a definite quantity of grease injected either into the steam pipe, as above stated, if the grease is to be fed to the steam pipe; or to the other part to Which the lubricant is to be conveyed.

Instead of a whistle any other suitable signaling device may be used to indicate when the piston rod has reached its uppermost position, or any other predetermined position of its travel.

It will be obvious that various other modifications might be made in the herein described apparatus, and in the construction, combination and arrangement of parts which could be used without departing from the spirit of my invention.

Having thus described my invention what I claim and desire to secure by Letters Patent of the United States is 1. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means including a three-Way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying ofl the grease from said grease cylinder, substantially as described.

2. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement there- With, a common piston rodfor both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to asource of steam supply for supplying fluid under pressure to said fluid pressuie cylinder, a three-Way valve connected tosaid pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, means for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying oil the grease from said grease cylinder, substantially as described.

3. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement there With,a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means for supplying fluid under pres sure to said fluid pressure cylinder at either side of its piston, a needle valve intermittently operatedby some moving part of the engine, for limiting the flow or" fluid from said fluid pressure cylinder, and means for carrying off the grease from said grease cyl inder, substantially as described.

4. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means including a three-Way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, a needle valve intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying ofl? the grease from said grease cylinder, substantially as described.

5. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a pis ton on said rod mounted in said grease cylin der, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, at either side of its piston, a needle valve intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying oil the grease from said grease cylinder, substantially as described.

6. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and. also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, a three-way 'alve connected to said pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, a needle valve intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying ofl the grease from said grease cylinder, substantially as described.

7. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a. common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, a needle valve intermittently operated by some moving part of the engine, means for adjusting said needle valve to control the flow of fluid by said valve, for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying off the grease from said grease cylinder, substantially as described.

8. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means including a three-way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, a needle valve intermittently operated by some moving part of the engine, means for adjusting said needle valve to control the flow of fluid by said valve, for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying oii the grease from said grease cylinder, substantially as described.

9. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, a needle valve intermittently operated by some moving part of the engine, means for adjusting said needle valve to control the flow of fluid by said valve, for limiting the flow of fluid from said fluid pressure cylinder, and means ton on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, a three-way valve connected to said pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, a needle valve intermittently operated by some moving part of the engine, means for adjusting said needle valve to control the flow of fluid by said valve, for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying off the grease from said grease cylinder, substantially as described.

11. A force feed lubricator comprising a fluid pressure cylinder, and a grease cylinder connected thereto, and in alinement therewith, a. common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means controlled by the movement of said piston rod for reversing the application of pressure in said pressure cylinder, means for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying ofl' the grease from said grease cylinder, substantially as described.

12. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means including a three-way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means controlled by the movement of said piston rod for shifting said valve as the piston rod reaches a predetermined position, means for limiting the floW of fluid from said fluid pressure cylinder, and means for carrying ofl' the grease from said grease cylinder, substantially as described.

13. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder. at either side of its piston, means controlled by the movement of said piston rod for reversing the application of pressure in said pressure cylinder, means for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying off the grease from said grease cylinder, substantially 'as described.

14. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, a three-way valve connected to said pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, means controlled by the movement of said piston rod for shifting said valve as the piston rod reaches a predetermined position, means for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying oil the grease from said grease cylinder, sub stantially as described.

15. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means controlled by the movement of said piston rod for reversing the application of pressure insaid pressure cylinder, a needle valve intermittently operated by some moving part of the engine, for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying off the grease from said grease cylinder, substantially as described.

16. A force feed lubricator comprising a luid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means including a three-way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means controlled by the movement of said piston rod for shifting said valve as the piston rod reaches a predetermined position, a needle valve intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying oil the grease from said grease cylinder, substantially as described.

17. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement there- With, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, at either side of its piston, means controlled by the movement of said piston rod for reversing the application of pressure in said pressure cylinder, a needle valve intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying ofl the grease from said grease cylinder, substantially as described.

18. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, a three-Way valve connected to said pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, means controlled by the movement of said piston rod for shifting said valve as the piston rod reaches a predetermined position, a needle valve intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying off the grease from said grease cylinder, substantially as described.

19. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means controlled by the movement of said piston rod for reversing the application of. pressure in said pressure cylinder, a needle valve intermittently oper ated by some moving part of the engine, means for adjusting said needle valve to control the flow of fluid by said valve, for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying oil the grease from said grease cylinder, substantially as described.

20. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston or. said rod mounted in said grease cylinder, means including a three-Way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means controlled by the movement of said piston rod for shifting said valve as the piston rod reaches a predetermined position, a needle valve intermittently operated by some moving part of the engine, means for adjusting said needle valve to control the flow of fluid by said valve, for limiting the floW of fluid from said fluid pressure cylinder, and means for carrying off the grease from said. grease cylinder, substantially as described.

21. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means controlled by the movement of said piston rod for reversing the application of pressure in said pressure cylinder, a needle valve intermittently operated by some moving part of the engine, means for adjusting said needle valve to control the flow of fluid by said valve, for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying off the grease from said grease-cylinder, substantially as described.

22. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement there- With, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, a three-Way valve connected to said pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, means controlled by the movement of said piston rod for shifting said valve as the piston rod reaches a predetermined position, a needle valve intermittently operated by some moving part of the engine, means for adjusting said needle valve to control the flow of fluid by said valve, for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying ofl the grease from said grease cylinder, substantially as described.

23. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means including a three-Way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means for limiting the flow oi": fluid from said fluid pressure cylinder, means for carrying off the grease from said grease cylinder, and means for signaling When the piston rod has reached a predetermined position, substantially as described.

2* A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, a threeway valve connected to-. said pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, means for limitingthe floW of fluid from said fluid pressure cylinder, means for carrying ofl the grease from said grease cylinder, and means for signaling when the piston rod has reached a predetermined position, substantially as described.

25. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement there with, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, a needle valve intermittently operated by some moving part of the engine, for limiting the flow of fluid from said fluid pressure cylinder, means for carrying oil the grease from said grease cylinder, and means for signaling when the piston rod has reached a predetermined position, substantially as described.

26. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means including a three-way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, a needle valve intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, means for carrying off the grease from said grease cylinder, and means for signaling when the piston rod has reached a predetermined position, substantially as described.

27. A force teed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mount-ed in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, a threeway valve connected to said pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, means controlled by the movement of said piston rod for automatically shifting said valve, and for simultaneouslv sounding a signal when said piston rod reaches a predetermined po sition in its stroke, meansintermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying ofl the grease from said grease cylinder, substantially as described.

28. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means including a three-way valve for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, means controlled by the movement of said piston rod for automatically shifting said valve, and for simultaneously sounding a signal when said piston rod reaches a predetermined position in its stroke, means intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pres sure cylinder, and means for carrying oil the grease from said grease cylinder, substantially as described.

2i). A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a pis ton on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, a three-way valve connected to said pipe for supplying fluid pressure at either side of the piston in said fluid pressure cylinder, means controlled by the movement of said piston rod for automatically shifting said valve, and for simultaneously sounding a signal when said piston rod reachesa predetermined position in its stroke, means intermittently operated by some moving part of the engine for limiting the flow of fluid from said fluid pressure cylinder, and means for carrying ofl' the grease from said grease cylinder, substantially as described.

30. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a pis ton on said rod mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder, and means automatically controlled by the speed of the engine for regulating the flow of fluid from said fluid pressure cylinder, therebv controlling the output of grease from the grease cylinder, substantially as described.

31. A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, a pipe connected to a source of steam supply for supplying fluid under pressure to said fluid pressure cylinder, and means automatically controlled by the speed of the engine for regulating the flow of fluid from said fluid pressure cylinder, thereby controlling the output of grease from the grease cylinder, substantially as described.

A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, and also a piston on said rod mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder, and a needle valve automatically and intermittcntly controlled by the speed of the engine for regulating the flow of fluid from said fluid pressure cylinder, thereby controlling the output of grease from the grease cylinder, substantially as described.

A force feed lubricator comprising afluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, said piston being provided with reversely -dispose d leather cups adapted to make a tight joint against fluid pressure from either side of said piston, and said piston being provided with an annular groove located between said cups and connected by a passage to an axial groove provided in the piston rod, said groove in said piston rod opening outward to show any leakage past said piston, the said piston rod being also provided with a piston mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, and means automatically controlled by the speed of the engine for regulating the flow of fluid from said fluid pressure cylinder, thereby controlling the output of grease from the grease cylinder, substantially as described.

A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, said piston being provided with reversely-disposed leather cups adapted to make a tight joint against fluid pressure from either side of said piston, and said piston being provided with an annular groove located between said cups and connected by a passage to an axial groove provided in the piston rod, said groove in said piston rod opening outward to show any leakage past said piston, the said piston rod being also provided with a piston mounted in said grease cylinder, a pipe connected to a source ofsteam supplv for supplying fluid under, pressure to said fluid pressure cylinder at either side of its piston, and means automaticallycontrolled by the speed of the engine for regulating the flow of fluid from said fluid pressure Copies of this patent may be obtained for five cents each, by addressing the Commissioner cylinder, thereby controlling the output of grease from the grease cylinder, substantially as described.

A force feed lubricator comprising a fluid pressure cylinder and a grease cylinder connected thereto, and in alinement therewith, a common piston rod for both of said cylinders, a piston on said rod mounted in said fluid pressure cylinder, said piston being provided with reverselydisposed leather cups adapted to make a tight joint against fluid pressure from either side of said piston, and said piston being provided with an annular groove located between said cups and connected by a passage to an axial. groove provided in the piston rod, said groove in said piston rod opening outward to show any leakage past said piston, the said piston rod being also provided with a piston mounted in said grease cylinder, means for supplying fluid under pressure to said fluid pressure cylinder at either side of its piston, and a needle valve automatically and intermittently controlled by the speed of the engine for regulating the flow of fluid from said fluid pressure cylinder, thereby controlling the output of grease from the grease cylinder, substantially as described.

In testimony whereof, I affix my signature.

SAMUEL M. JENKINS.

of Patents,

' Washington, D. C." 

